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Laser surface nitriding of yttria stabilized tetragonal zirconia

DSpace at IIT Bombay

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Title Laser surface nitriding of yttria stabilized tetragonal zirconia
 
Creator KATHURIA, YP
 
Subject mechanical-properties
thin-films
titanium
plasma
zr3n4
laser
t-zro2
zrn
raman microscopy
 
Description Surface nitriding of yttria (Y2O3) stabilized tetragonal zirconia (t-ZrO2) has been performed using the pulsed Nd-YAG laser irradiation in the nitrogen atmosphere. The results show modifications of the crystallographic structure between the original tetragonal zirconia and the treated one. Nitrogen atoms enter in the zirconia substituting to oxygen atoms in the network. X-ray diffraction and Raman spectra show an efficient transformation of the t-ZrO2 at the surface that exhibit the typical yellow-gold color of ZrN with high hardness and wear resistance. The hardness measured with Vickers indenter bears a high value of about 1409 HV Nitriding is accomplished by the formation of a few micron thick gradient layer of ZrN structure on the top and a partial transformation of t-ZrO2, into cubic zirconia (c-ZrO2) beneath deep in the bulk due to nitrogen concentration gradient. (c) 2006
 
Publisher ELSEVIER SCIENCE SA
 
Date 2011-07-28T11:07:37Z
2011-12-26T12:59:10Z
2011-12-27T05:50:08Z
2011-07-28T11:07:37Z
2011-12-26T12:59:10Z
2011-12-27T05:50:08Z
2007
 
Type Article
 
Identifier SURFACE & COATINGS TECHNOLOGY, 201(12), 5865-5869
0257-8972
http://dx.doi.org/10.1016/j.surfcoat.2006.10.041
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7385
http://hdl.handle.net/10054/7385
 
Language en